I just came across this case about Gain Capital also known as forex.com. At the risk of receiving a lot of abuse from the forex experts I have to say that I think this proves what goes on behind the scenes and how slippage in particular is managed in favour of the brokers. All these excuses about 'market volatility' seems to be just nonsense. The manipulation of the margin requirements makes good reading too.
The interesting documents can be found from the links on this summary page (complaint and decision).
http://www.nfa.futures.org/news/newsRel.asp?ArticleID=3676
The interesting documents can be found from the links on this summary page (complaint and decision).
http://www.nfa.futures.org/news/newsRel.asp?ArticleID=3676